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Re: [TenTec] Ten-Tec 9420 Hercules power supply schematic.

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Ten-Tec 9420 Hercules power supply schematic.
From: Jim Brown <k9yc@audiosystemsgroup.com>
Reply-to: k9yc@arrl.net, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sat, 15 Aug 2015 10:22:57 -0700
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
On Fri,8/14/2015 4:57 PM, Wade Staggs wrote:
*               Check out your inbox for the message from
tvman1954@gmail.com <tvman1954@gmail.com>   The 2 page schematic is all
that I have. Sure wish that we could have been more helpful.... Just
remember that this is really Four power supplies in one case. Kind of a
strange way of doing things but, it works. If you have further questions?
Don't be afraid to ask. If I can't answer the question correctly, we will
make something up or lie to you about it!! hi .. hi ..*
*                                                      73 from Wade/KJ4WS*

On Fri, Aug 14, 2015 at 4:21 PM, Randy Randall <randy.ab9go@gmail.com>

Hello all,

I just picked up a Ten-Tec 420 Hercules II amp this past weekend with an
Astron RM-70 power supply.  Since the overload protection is in the Ten-Tec
power supply I would like to see what scheme TT used.  Whoever had the amp
before me did not include any overload protection not even a  lowly fuse.
  I have not been able to locate the schematic from the usual sources and
was hoping someone here had a copy.

The Herc II is also four power amps combined into a single input and single output. One way to run it is to use one big Astron for two of the amps and a second big Astron for the other two. It is critical that the sensing circuitry of the Astrons be connected together. I ran my Herc II this way for a while, with no issues. It's currently a spare amp in my closet.

73, Jim K9YC
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